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United States Patent | 5,258,547 |
Sheldrake | November 2, 1993 |
A process for preparing halogenated compounds of formula RCY(Z)CH.sub.2 CH(X)C(CH.sub.3)CH.sub.2 COR.sup.1 where X, Y and Z are halo, R is alkyl, halo, haloalkyl or aryl, and R.sup.1 is hydroxy, halo, alkoxy, alkyl or haloalkyl, or the residue of a pyrethroidal alcohol, in which a compound of formula CH.sub.2 =CHC(CH.sub.3).sub.2 COR.sup.1 is reacted with a sulphonyl halide of formula RCY(Z)SO.sub.2 X. The process avoids the use of volatile halocarbons in the production of valuable intermediates for insecticides.
Inventors: | Sheldrake; Gary N. (Huddersfield, GB2) |
Assignee: | Imperial Chemical Industries plc (London, GB3) |
Appl. No.: | 818329 |
Filed: | January 9, 1992 |
Jan 11, 1991[GB] | 9100654 |
Current U.S. Class: | 560/226; 560/8; 560/100; 560/184; 560/227; 560/229; 562/490; 562/586; 562/602; 562/605; 562/840; 562/849; 562/856; 562/864; 568/303; 568/323; 568/348; 568/364; 568/365 |
Intern'l Class: | C07C 273/00; C07C 063/36; C07C 049/00 |
Field of Search: | 560/8,100,184,226,227,229 562/490,586,602,605,840,849,856,864 568/303,323,348,364,365 |
4252820 | Feb., 1981 | Lantzch et al. | 424/304. |
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0053812 | Apr., 1977 | JP | 562/605. |
0158134 | Aug., 1985 | JP | 562/605. |
1520443 | Aug., 1978 | GB. |